Substituted diphenyl-chloracetates



Patented Aug. 28, 1962 3 051 705 SUBSTITUTED DIPIlENYL-CHLORACETATES Seymour L. Shapiro, Hastings on Hudson, Louis Freedman, Bronxville, and Harold Soloway, New Rochelle,

The compounds are bases and can be converted to their hydrohalide salts by treatment of one equivalent of the basic ester with one equivalent of hydrogen halide in a medium such as ethanol and the like. The free bases can NY assignors to U S Vitamin & Pharmaceutical- 5 also be converted to their quaternary ammonium salts by Corpln'ation, a corporatioh of D l treatment of the base with such reagents as methyl iodide, No Drawing. Filed Apr. 7, 1960, Ser. No. 20,529 ethyl bromide, benzyl chloride, ethyl bromoacetate and the 4 Claims. (Cl. 260247.2) like.

The compounds which have been prepared in the devel- This invention relates to certain novel diphenylchloropment of this invention are shown in Table I.

TABLE I (CaH5)zCCO0CHCH2NR2Rs-R4X Analyses percent B M.P. R; R3 R X C. or 0 Percent Formula B.P. Yield 0 H N (mm.) Calc. Gale. Cale.

Fd Fd. Fd.

-(0H:)4 H01 178481 31 OZBHWCIZNOQ.-. 68.4 6.0 3.1 68.2 5.9 3.0 (CH;)4- H01 182 184 02011270120102--- 28.3 2.3 7. (0H) H01 169-171 66 C27H2BCIZNOL 22.3 2.3 0H)20 0H2 n01 184-186 36 C2oH27Cl2NOa.-- 66:1 518 310 66.1 6.0 3.1

a The term RiX defines the hydrohalide salt or quaternizing group. b The term C5H is phenyl.

u Melting points are not corrected.

d Yields are expressed as percent of recrystallized or distilled product. e Analyses are by Weiler and Strauss, Oxford, Englan 1 The compound acetic acid esters and the salts thereof which have useful pharmacological properties. The compounds of this invention may be represented by the general formula wherein R and R are selected from the group consisting of hydrogen and phenyl so that when R=phenyl, R =hydrogen and when R==hydrogen, R =phenyl, R is selected from the group consisting of lower alkyl, aralkyl and cycloalkyl; and wherein with the nitrogen R and R form heterocyclic rings such as pyrrolidino, pipen'dino and morpholino, and C H is phenyl.

The compounds of this invention show useful pharmacological properties particularly as central nervous system depressants, and antitremorine eifects. (This latter activity has been associated with the capacity to inhibit the tremors of Parkinsons disease.)

The preparation of the novel compounds of this invention is effected by treatment of the acid chloride (C H C(C1)COCl with the amino alcohol of the formula shown An inert organic solvent such as benzene or acetonitrile is used for the reaction and after a suitable period the formed ester is either isolated directly as its hydrochloride or the hydrochloride is converted to the free base which is isolated by distillation.

The requisite amino alcohols used as initial reactants have been described by Shapiro, et al., J. Am. Chem. Soc., 80, 6060 (1958).

d. is derived from the isomeric 2-(1-pyrrol1'diuo)-2-phenylethanol.

Following are illustrative examples characteristic of but not limiting the scope of the invention.

EXAMPLE 1 Z-Piperidino-l-Phenylethyl m-Chl0r0-a,u-Diphenylacetate Hydrochloride A solution of 19.9 g. (0.075 mole) of a-chlorodiphenylacetyl chloride in mls. of acetonitrile was added to a suspension of 14.3 g. (0.07 mole) of 2-piperidino-l-phenylethanol in 30 mls. of acetonitrile. After storage at 20 for 24 hours there was obtained 30.2 g. which upon recrystallization (methyl ethyl ketone) gave 66% of product M.P. 16917 1.

The other compounds in the table are prepared in a similar manner.

The novel compounds of this invention can be combined with solid or liquid pharmaceutical carriers and formulated into the form of tablets, powder packets or capsules or dissolved in suitable solvents for oral and parenteral administration for human and veterinary use.

It is to be understood that it is intended to cover all changes and modifications of the example herein chosen for the purpose of illustration which do not constitute departures from the spirit and scope of the invention.

This application is a continuation-in-part of our 00- pending application, Serial No. 814,387, filed May 20, 1959, now abandoned.

We claim:

1. The compound 010 I II 2. The compound 3. The compound 4. The compound selected from the group consisting'of 4 diphenylchloracetate esters of aminophenylethanol and the non-toxic hydrochloric acid salts and methiodide salts thereof of the formula References Cited in the file of this patent- UNITED STATES PATENTS 2,628,247 Goldberg et a1 Feb. 10, 1953 UNITEDS TAT ES- PATENT LOF ItIC E CERTIFICATE f OF CQRRECTION Patent No. 3,051,705 Angnsitg28 1962 Se mo r Shapiro et a1.

It is hereby certified that error appeers in the above numbered pat I ent requiring correction and that the said Letters Patent should read as corrected below.

Column 1, 1155s 45 to 4L7 strike out "R selected from the group consisting of lower ve-lkyl aralkylviand cycq aikilyr; I.

Signed and sealed this 15th day of J annary 1963c SEA L) Attest:

ERNEST w. SWIDER VID L- LADD Attesting Officer v v cclnm'issioner of Patents 

3. THE COMPOUND
 4. THE COMPOUND SELECTED FROM THE GROUP CONSISTING OF DIPHENYLCHLORACETATE ESTERS OF AMINOPHENYLETHANOL AND THE NON-TOXIC HYDROCHLORIC ACID SALTS AND METHIODIDE SALTS THEREOF OF THE FORMULA 